Phylogenetic relationships between the tideland snails Batillaria flectosiphonata in the Ryukyu Islands and B-multiformis in the Japanese Islands
Phylogenetic relationships between the tideland snails Batillaria flectosiphonata in the Ryukyu Islands and B-multiformis in the Japanese Islands
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DOI：
10.2108/zsj.20.1423
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发表时间：
2003-11-01
影响因子：
0.9
通讯作者：
Furota, T
中科院分区：
文献类型：
--
作者：
Kojima, S;Kamimura, S;Furota, T
根据细胞色素氧化酶I线粒体基因的核苷酸序列，分析了日本列岛的多形巴蒂利亚钉螺和琉球群岛的多形巴蒂利亚钉螺和琉球列岛多形巴蒂利亚钉螺的系统发育关系。除大岛岛的一个种群外，多形巴蒂利亚钉螺的种群在遗传上与多形巴蒂利亚钉螺完全不同，与琉球列岛钉螺的分布界线一致。在大岛岛的同一滩涂采集了携带线粒体基因的多形假单胞菌和携带线粒体基因的屈管藻的个体。所有携带多形芽胞杆菌线粒体基因的钉螺可分为两个不同的群体，但这两个群体的分布没有地理结构。在Amami、冲绳、宫古和八山岛群中，除了冲绳岛北部的一个种群外，每个种群都只由一组独特的单倍型组成，其中包括几个与Amami岛群中的个体序列相关的个体。所有来自南琉球的个体都形成了一个支持良好的单系类群，而来自中部琉球的个体的单系不被支持。多形假单胞菌的单调性明显，但没有证据支持多形假单胞菌的单系性。多形巴蒂利亚可能来自琉球群岛的移民，琉球群岛在日本群岛上变得孤立并在基因上分化。
Phylogenetic relationships between two sibling species of Japanese tideland snails, namely, Batillaria multiformis from the Japanese Islands and B. flectosiphonata from the Ryukyu Islands, were analyzed on the basis of the nucleotide sequences of the mitochondrial gene for cytochrome oxidase I. Populations of B. multiformis were genetically distinct from those of B. flectosiphonata with the exception of a population from Amami-Oshima Island, which corresponded to the boundary between the distributions of these two species. Individuals with the mitochondrial gene of B. multiformis and those with the mitochondrial gene of B. flectosiphonata were collected from the same tidal flat on Amami-Oshima Island. All the snails with the mitochondrial gene of B. multiformis could be divided into two genetically distinct groups but there was no geographical structure to the distribution of these two groups. Individual populations of B. flectosiphonata in the Amami, Okinawa, Miyako and Yaeyama insular groups each consisted exclusively of a unique set of haplotypes, with the exception of a population at a northern site on Okinawajima Island, which included a few individuals with sequences related to those of individuals in the Amami insular group. All individuals from South Ryukyu formed a well-supported monophyletic group, while the monophyly of individuals from Central Ryukyu was not supported. The monophyly of B. multiformis was clearly demonstrated but there was no evidence to support that of B. flectosiphonata. Batillaria multiformis might have been derived from immigrants from the Ryukyu Islands, which became isolated and diverged genetically on the Japanese Islands.